| /* |
| * Copyright (c) 2003, 2004, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package java.lang; |
| |
| import java.io.IOException; |
| |
| /** |
| * An object to which <tt>char</tt> sequences and values can be appended. The |
| * <tt>Appendable</tt> interface must be implemented by any class whose |
| * instances are intended to receive formatted output from a {@link |
| * java.util.Formatter}. |
| * |
| * <p> The characters to be appended should be valid Unicode characters as |
| * described in <a href="Character.html#unicode">Unicode Character |
| * Representation</a>. Note that supplementary characters may be composed of |
| * multiple 16-bit <tt>char</tt> values. |
| * |
| * <p> Appendables are not necessarily safe for multithreaded access. Thread |
| * safety is the responsibility of classes that extend and implement this |
| * interface. |
| * |
| * <p> Since this interface may be implemented by existing classes |
| * with different styles of error handling there is no guarantee that |
| * errors will be propagated to the invoker. |
| * |
| * @since 1.5 |
| */ |
| public interface Appendable { |
| |
| /** |
| * Appends the specified character sequence to this <tt>Appendable</tt>. |
| * |
| * <p> Depending on which class implements the character sequence |
| * <tt>csq</tt>, the entire sequence may not be appended. For |
| * instance, if <tt>csq</tt> is a {@link java.nio.CharBuffer} then |
| * the subsequence to append is defined by the buffer's position and limit. |
| * |
| * @param csq |
| * The character sequence to append. If <tt>csq</tt> is |
| * <tt>null</tt>, then the four characters <tt>"null"</tt> are |
| * appended to this Appendable. |
| * |
| * @return A reference to this <tt>Appendable</tt> |
| * |
| * @throws IOException |
| * If an I/O error occurs |
| */ |
| Appendable append(CharSequence csq) throws IOException; |
| |
| /** |
| * Appends a subsequence of the specified character sequence to this |
| * <tt>Appendable</tt>. |
| * |
| * <p> An invocation of this method of the form <tt>out.append(csq, start, |
| * end)</tt> when <tt>csq</tt> is not <tt>null</tt>, behaves in |
| * exactly the same way as the invocation |
| * |
| * <pre> |
| * out.append(csq.subSequence(start, end)) </pre> |
| * |
| * @param csq |
| * The character sequence from which a subsequence will be |
| * appended. If <tt>csq</tt> is <tt>null</tt>, then characters |
| * will be appended as if <tt>csq</tt> contained the four |
| * characters <tt>"null"</tt>. |
| * |
| * @param start |
| * The index of the first character in the subsequence |
| * |
| * @param end |
| * The index of the character following the last character in the |
| * subsequence |
| * |
| * @return A reference to this <tt>Appendable</tt> |
| * |
| * @throws IndexOutOfBoundsException |
| * If <tt>start</tt> or <tt>end</tt> are negative, <tt>start</tt> |
| * is greater than <tt>end</tt>, or <tt>end</tt> is greater than |
| * <tt>csq.length()</tt> |
| * |
| * @throws IOException |
| * If an I/O error occurs |
| */ |
| Appendable append(CharSequence csq, int start, int end) throws IOException; |
| |
| /** |
| * Appends the specified character to this <tt>Appendable</tt>. |
| * |
| * @param c |
| * The character to append |
| * |
| * @return A reference to this <tt>Appendable</tt> |
| * |
| * @throws IOException |
| * If an I/O error occurs |
| */ |
| Appendable append(char c) throws IOException; |
| } |